/*
 * Copyright (c) 2021 MediaTek Inc.
 *
 * Use of this source code is governed by a MIT-style
 * license that can be found in the LICENSE file or at
 * https://opensource.org/licenses/MIT
 */

#pragma once

#include <sys/types.h>

struct mmc_ioc_cmd {
    /* Implies direction of data.  true = write, false = read */
    int write_flag;

    /* Application-specific command.  true = precede with CMD55 */
    int is_acmd;

    u32 opcode;
    u32 arg;
    u32 response[4];  /* CMD response */
    unsigned int flags;
    unsigned int blksz;
    unsigned int blocks;

    /*
     * Sleep at least postsleep_min_us useconds, and at most
     * postsleep_max_us useconds *after* issuing command.  Needed for
     * some read commands for which cards have no other way of indicating
     * they're ready for the next command (i.e. there is no equivalent of
     * a "busy" indicator for read operations).
     */
    unsigned int postsleep_min_us;
    unsigned int postsleep_max_us;

    /*
     * Override driver-computed timeouts.  Note the difference in units!
     */
    unsigned int data_timeout_ns;
    unsigned int cmd_timeout_ms;

    /*
     * For 64-bit machines, the next member, ``u64 data_ptr``, wants to
     * be 8-byte aligned.  Make sure this struct is the same size when
     * built for 32-bit.
     */
    u32 __pad;

    /* DAT buffer */
    u64 data_ptr;
};
#define mmc_ioc_cmd_set_data(ic, ptr) ic.data_ptr = (u64)(unsigned long) ptr

/**
 * struct mmc_ioc_multi_cmd - multi command information
 * @num_of_cmds: Number of commands to send. Must be equal to or less than
 *  MMC_IOC_MAX_CMDS.
 * @cmds: Array of commands with length equal to 'num_of_cmds'
 */
struct mmc_ioc_multi_cmd {
    u64 num_of_cmds;
    struct mmc_ioc_cmd cmds[0];
};

#define MMC_BLOCK_MAJOR 179
#define MMC_IOC_CMD _IOWR(MMC_BLOCK_MAJOR, 0, struct mmc_ioc_cmd)
/*
 * MMC_IOC_MULTI_CMD: Used to send an array of MMC commands described by
 *  the structure mmc_ioc_multi_cmd. The MMC driver will issue all
 *  commands in array in sequence to card.
 */
#define MMC_IOC_MULTI_CMD _IOWR(MMC_BLOCK_MAJOR, 1, struct mmc_ioc_multi_cmd)
/*
 * Since this ioctl is only meant to enhance (and not replace) normal access
 * to the mmc bus device, an upper data transfer limit of MMC_IOC_MAX_BYTES
 * is enforced per ioctl call.  For larger data transfers, use the normal
 * block device operations.
 */
#define MMC_IOC_MAX_BYTES  (512L * 1024)
#define MMC_IOC_MAX_CMDS    255
